Malicious PDF — malware analysis report

Static analysis result for SHA-256 b226ce2014596b1b…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 02:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2323a8fe707f2a3053992e7bef28c9e SHA-1: bba0c4032b1381e3082ecebbc36ecb5bac89d093 SHA-256: b226ce2014596b1b409a674f85a583dedfec0125386b7fd945dbeeef7c2d823c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. Heuristics indicate these are part of a link farm designed to redirect users, with one URL specifically mentioning a 'house in the dark of the woods' and a 'utm_term' parameter, suggesting a lure. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=house+in+the+dark+of+the+woods
    • http://xaydungphongphu.com/uploads/files/depexawukevizi.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e220705135---marexirudenurenaromo.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d07b050625d---14361962000.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c0a8457a---fipopupifuja.pdf
    • https://ratsimae.eemedia/contents/file/wogodofiduv.pdf
    • http://campfirewtx.org/userfiles/file/mixokono.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/qfm0c2rr46eae3akonmseundmv/56041780693.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/418b85f48859cd3e16f156cd78850667/57024193620.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0454250875---gigedutapogit.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/36a88ceda6a301fffbddd01c909003e7/13696025595.pdf
    • http://tvkinter.com/file_media/file_image/file/mepajumugatoluwol.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/u9iabsju98auavo4cj76ld5mt7/35889263077.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160878ec8c7445---tomanewoboginak.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/3e0fee8f9aaed45dd5cd24cf5ea07d45/fonoxudeduwalawel.pdf
    • http://sun-eko.eu/files/file/29329136844.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/fb4fff1ea7a54c6b425f6e38a2ec62b8/lolej.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/1eb53daef909730920cb8467defa5d25/72983616743.pdf
    • http://topas.lt/userfiles/file/sulejisuxe.pdf
    • http://moscowprice.com/content/xuploadimages/file/29254401576.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5863416688---zejuxegipugila.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2ui2b64hu6131e9mshi5m44k73/dapojevuna.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ee2edd73ce76798bc2b905ae07523206/pavobezubem.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbab6ce78f---vuwibomivesujarizebikoz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e716.bin
74bc528886b2f25cdf125a3f2a2d7ca7660b2f5305c84e3f14dd7a5bff4c00b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 10672 bytes
font_01_sfnt_off0000ff84.bin
b422d90bbe4b2f93c6aaa7a417e659b4314fa7b4bb7fad6247a4a055fd3f13c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 17572 bytes
font_02_sfnt_off00012d62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D62 16792 bytes

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